Firstly, roughly break the entire vermicelli for better handling, to prevent it from flying all over.
Heat ghee in a pan or kadai and let it melt. To this melted ghee add vermicelli and sauté initially on moderate flame. As the heat builds up, work on slow flame.
Intermittently, flip the vermicelli from one side to another so that they are roasted and browned uniformly. Make no haste, patience reaps its reward.
Five minutes into sauteing, you will see that the vermicelli has somewhat settled, at this stage add crushed cardamoms and salt.
Continue to sauté for another five minutes till the color deepens. Eyeball very carefully. In the meanwhile, heat water till moderately hot.
When you see that the color of vermicelli has relatively deepened, add a cup of hot water to it. Gently flip the vermicelli so that water is incorporated uniformly. Add more water as needed, tablespoon at a time. This variety of vermicelli gets cooked quickly, with just the moisture. Keep this in mind while adding the water.
Cover the kadai/pan and let vermicelli cook for 2 minutes on low flame. Thereafter add sugar. Mix gently. You may need another tablespoon of water to enable the sugar to melt and mix with vermicelli.
Cover and cook on lowest flame for around 8-10 minutes. During this last stage, vermicelli will absorb the liquid from melted sugar and fluff up.
Put off the flame. Seyun is ready!